Buckingham Palace in London, it didn't actually always have this name. In 1705, the year of its construction, it was called Buckingham Palace due to the name of the Duke who had built it. From 1837 is the official residence of the British Royal Family after St. Jame's Park was deemed not too impressive.
I entrance tickets to visit Buckingham Palace are on sale in the Green Park kiosk. Indeed Buckingham Palace opens 19 of its 661 rooms in August and September, when the royal family goes on holiday to Scotland.
If you are passionate about royal families then and do not miss anything about the monarchy you cannot miss the Changing of the guard which takes place every day at certain times right in front of Buckingham Palace. In front of the building there is also a 25 meter high column, if you wonder what it is I tell you it is there Queen Victoria Memorial.